Mill for grinding paper-pulp



PETERS, PHOTOL|THOGRAPHER. WASHINGTON. D C.

Athe following specification and the accom- 'EN OFF@ JOSEPH JORDAN, JR., OF -IIAST HARTFORD, CONNECTICUT.

MILL FOR GRINDING PAPER-PULP.

Specification of Letters Patent No.

To all whom 'it may concern: k

Be it known that I, JOSEPH JORDAN, Jr., of East Hartford, in the county of Hartford and State of Connecticut, have invented an Improved Machine for Grinding or Reducing Paper Stuff to Pulp and `Sizing the Same; and I do hereby declare that the same is fully described and represented in panying drawings, of whichh Figure 1, denotes a top view; Fig. 2, a side elevation; Fig. 3, a longitudinal section, and Fig. a, a transverse section of the same this latter section being taken through the conduit for the induction of the size or sizing material. Fig. 5, is a vertical and transverse section taken through the stulf reservoir. Fig. 6, is a side view of the male grinder. Fig. 7, is a reduced front end view of the female grinder head.

The nature of my invention or improvement consists in a new arrangement of the knives of ,either grinder, the same consisting in disposing them in transverse rows or sections and so that those of one section or series shall beso generally or wholly out of range with those of the next series, that each channel between any two next adjacent knives of one series may, at its end next adjacent to the other series, enter into two or more of the channels of such series. Also, in an arrangement of the knives of both grinders whereby the male grinder may be employed to advantage in sharpening the knife of the female grinder; also, in a further arrangement of the knives of the male grinder such being as hereinafter described.

In the drawings, A, denotes the male grinder which in external form is a conical frustum. It is fixed on a driving shaft, B, which runs axially through it anda female grinder or'shell C, which receives the male grinder as shown in the drawings. The axis of the shell C, is intended to be arranged horizontally.

The driving shaft plays through stuffing boxes, a Z), affixed respectively to the two heads, c, c, of the shell, C. Furthermore, that end 'of the said shaft which is next to the driving pulley, D, is sustained in a stationary box or bearing, E, while the oppo site end of the shaft rests in a movable box, F, supported within a troughed bracket, Gr, projected from the larger head of the case or female grinder and provided with an ear or standard, CZ, through which the adjusting 31,321, dated February 5, 1861.

screw, H, is screwed. rIhe shaft, B, is furnished with shoulders, e, f, arranged ywith respect to the box, F as shown in Figs. 1, and 3. The screw H, carries a hand wheel I, and is applied to a cross bar g, in the same manner as the shaft B, is to the box F, such shaft, g, being connected to the box, F, by two rods, z', z', arranged as shown in the drawings. By such a mode of applying the adjusting screw, H, to the driving shaft, the

inner end of the screw does not touch the shaft and therefore, is never worn thereby or the shaft worn by the screw while the shaft may be in rapid revolution. IVhen the hand wheel of the screw is put in rotation, the male grinder will be moved longitudinally within the case.

Over the lesser end of the case u, the stuff reservoir, K, is placed it being constructed in the usual manner and made to open into the case as shown at 7e. Near to the reservoir, the case is furnished with a conductor or pipe, Z, for the induction of steam, the conduit for the supply of the sizing liquid or material being shown at m. The larger head of the case has a series of orifices, a, a, a, they being arranged in it at different altitudes, and each being capable of receiving the eduction 0. Then such pipe may be in either of the said holes, each of the others is to be stopped by a plug, 79. The object of these apertures is to enable the depth of the pulp in the machine to be regulated as its nature may require in order that it may be properly ground.

In constructing each grinder, I make it with several series of blades or knives 1*', 1", 1', or s, S, s, those of each series being placed longitudinally on and arranged around the surface of the body of the grinder, the same being as shown in the drawings. Each of such blades is so disposed with respect to those of the series next to either of its ends,

that such blade if projected longitudinally,A

would vpass between two next adjacent blades of the adjacent series. In this way, the knives will be so arranged, that each channel formed between and by any two next adjacent knives of one series, will, at its end next to the other series, be opposite, and open into two or more channels of such. This arrangement of the knives causes divisions of the streams of pulp and prevents clogging of the grinders. It also causes reduction of the pulp to be made to better advantage than when each of the knives is made to extend from end to end of the grinder. Each knife of the male grinder I arrange as shown in Fig. 6, that is to say, at an acute angle with a plane extending lonF gitudinally through the axis of the grinder.

In the female grinder, that part of each knife which projects into the cavity or in terior of the grinder and beyond the inner surface of the case thereof has a bend or inclination to the said inner surface as shown in Figs. a and By so arranging each of the knife blades of both grinders, the knives of the female grinder may be sharpened at any time to excellent advantage, to accomplish which we have simply to reverse the rotary motion of the male grinder and move it longitudinally so as to force its .blades against those of the female grinder.

Each. of the knives of the male grinder while thus acting against any knife ofthe female grinder cuts it from end to end with a drawing stroke and in a manner very favorable to its reduction and by reason of the angular inclination of the knife of the female grinder with respect to the inner surface of such grinder (such inclination being shown in Fig. el.) a sharp or acute angular cutting edge will be formed on the knife.

Each series of knives of the outer grinder may be inserted in staves or sectional portions or blocks 2f, t separate fromy and fitted to an outer shell. or case, u, and held in place by screws, fw, fw, or by other proper means. In this way, each section or portion, when its blades may become too much worn, or dulled, may be removed and a fresh one substituted for it. Furthermore, the knives or blades of the male grinder are so arranged that those of its larger section or series are nearer together than those of the next smaller section which in turn are also nearer together than those of the next or smallest section, the knives, at the lower end of the grinder being arranged at greater distances apart than at its greater end. This arrangement not only prevents the pulp, when first introduced from choking the grinders, but is highly advantageous in other respects, particularly in the reduction of the pulp.

The introduction of steam into the grinder case with the pulp and sizing enables the grinders to more easily reduce the fibrous matters and causes the latter to take the sizing tobetter advantage, and especially, when paper is to be ground 1n the machine, as the steam loosens the adhesion of .the fibers to each other and causes the sizing to penetrate them easily and quickly. It also produces other important advantages.

My present machine may be considered a great improvement on that heretofore patented by me and Thomas Eustace. I would remark that I do not herein claim a pulp grinder as constructed of a single conical grinder and outer shell and with its pipes for-tlie introduction of rags and size and the eduction of both arranged with reference to the axis and ends of the grinder substantially as exhibited in the United States Patent No. 20277, as granted to me and the .said Eustace.

What I claim as my invention. in machinery for reducing paper stuff to pulp and desire to secure by Letters Patent is as follows, viz: V

l. The arrangement of the knives of either grinder, they being disposed in rows, series or sections extending transversely around the grinder, and having their knives so further arranged that those of one section or series shall be so generally or wholly out of range with 'those of the next series, that each channel. between any two next adjacent knives of one series, may, at its end next adjacent to the other series open into two or more of the channels of such series.

2. The above described improved mode of arranging the knives of both grinders, whereby those of the male grinder may be employed to advantage in manner as described to sharpen the knives of the female grinder, such arrangement of the knives being exhibited in Figs. 4L and 6. And when the knives of the male grinder are arranged in two or more series, each of which shall extend transversely around the grinder as described, I claim the further arrangement of the knives in such manner, that those of each series from the smaller to the larger end of the grinder shall be at less distances apart than those of each series preceding it, the same bei-ng substantially as exhibited in Fig. 6, and as above described.

JosErH JORDAN, JR.

Vitnesses It. I-I. EDDY, I. I). HALE, Jr. 

